Inertia-operated pumping mechanism



NW, 2%, 192:9 F. B. MMLAREN 1,737,380

INERTIA OPERATED PUMPING MECHANISM I Original Filed April 10, 1922 I'J I n v H INVENTOR. Fred 5. Mac! are/7 Patented Nov. 26, 192 9 omits stares? T eerie-s v ram) 1i. IVIACLARQENV, or JAMAICA,- Nnw agi trates To oif-msinit ii. BRAsEiron,

or NEW Yon-K, is. Y.

IlVERTIA-OP'ERATED ruiviriive iviil c'HAiiI'siii Application filed. April 10, 1922, Serial No. 5513669; Iteiietveti odtdte'r 3'1"; 19 27.

V to an auxiliary tank above the carburetor have Another object of my invention is the an rangement of the auii-iliary tank and pump ing mechanism therein so that an automatic control is effected whereby the maximum quantity of liquid Within such tank at any time may be controlled; p

Another object is th divide theauxiliary tank into a lower or fuelchamber and an upper oi 'darnpiiig chamber; The tivo' chambers being connected by relatively small aperture, and the' damping chamber serves to provide an automatic regulating means for controlliii'g the height of the liquid in the fuel chamber.

7 their objects advantagesivvill apparent from the following descript on 1n which ieieieiiee is had to the accompanying drawing forming a part (if this specification, and in which similar reference numerals designate similar parts throughout the several views. p

In the drawings Figure I is a diagrammatic side elevation of an automobile equipped with my improved apparatus. 7

Figure II is a central longitudinal sect on, through the auxiliary tank and vibration operated pumping mechanism. M l

Referring now to the drawings, the numeral 5' designates thechassis of anautomoblle having the usual Wheels 6, engine 7 rear fu'el supply tank 8 carburetor 9; my improved auxiliary tanl; 10 encloslng the pumping mechanism. auxllrary tank 10 is herein shown as secured upon the front of the dashboard 11, although this may be mounted in any convenient pos1t1on upon the automobile at a suflicie'nt height to enable liquid in the auxiliary tanl; to flow to the carburetor by gravity; The tank 10 is preferably cylindrical and is provided centrally of its lower Wall with an opening 12 having an upturned flange adapted to pos'i tion a eylinder'l3 extending upwardly with-" in the tank for are'latively short distance; The lower extremity of the cylinder-13 is" adapted to be closed by a valved bushing 14 With Which a coupling 15 is connected leading to the feed pipe 16 connected at its rear extremity with the-fuel supply tank .8. A coupling 17 leads from the floor of the tank 1O to the feed pipe 18 connecting the 60 auxiliary tank to the carburetor 9.

The valve in the bushing 14 may be of any desired construction, is herein shown as comprising a ball 19 arranged in a chain hei- 20 and adapted to; hoiiiially seat upoii and close the aperture 21 leading to the supply pipe 16. Ah a erture 22 'coririe'cts the chamber 20 With the interior of the cylinder 13. A plunger 23 surmounted by a Weight 24- tog 'ther formirigiiiertia me'mh'er is ada ted to"snu'g"ly fit at its lower extremity within the eylii'ider' 1-3, a brass or other soft, metal cap 25' being suitably pressed upon the plunger 23' and machined to snug-1 fit within said cylinder. l-lii outlet valve for the passage of liquid within the; cylinder to the interior of the tank 10 is provided by aprturing the-ca 25' and normally closlllg such aperture b a ball- 26; the valve chamber surrounding such ball connecting with an u 'oper opening 27 leading through the sides of the plunger into the tank 10. For convenience in construction the aperture 27 is preferably formed as' a slot extendin from side to side across the plunger and the valve chamber is an enlargemei'itof the lower extremity of said slot. It will be understood however, that this" construction" may he changed at will a'fid that the illustration herein is only by Way of'e'xemplification.

The inertia mechanism is normally mai'n- I tain'ed with the plunger 23 raised by means of a coil spring 28 surrounding the plunger and eiten'din'g" between the lower surface of the weight 245 and the floor of the tank.- The weight is guided in its movements relatively to the shell of the" tank by means of separa- 'tioriplate 29 having a central aperture 30 with doivnturned flange 30' of a diameter only slightly greater than the diameter of the weight 24, whereby the weight is sur- 31 between such plate and a cap 32 enclosing the top of the tank 10. In the illustrated em- 7 bodimentwe have shown the separation plate 29 and cap 32 as secured over the outwardly extending flange 33 of the tank by the same screws34. This construction permits a ready assembly and accurate machining for centering all of the devices with their guiding flanges in alignment. Thus by accurately turning the periphery of the flange 33 and then bending the outer portion of the separation plate 29 thereover after the circular flange portion 35 thereof has been accurately machined on its inner surface I am enabled to quickly and accurately center the separation plate within the tank 10. By then constructing the cap 32 with a downturned flange 36 accurately fitting over the circular flanged portion 35 of the separation plate the cap may also be quickly assembled with its central aperture 36 in alignment with the guide flange 30 of the separation plate. The central aperture 36 of the cap is flanged substantially as shown to guide the rod 37 projecting upwardly from the inertia member. A small buffer spring 38 may be provided between the cap 32 and the upper portion of the weight 24 to prevent chattering of the moving parts. The upper portion of the weight 24 is preferably enlarged, as at 39 and provided adjacent its lower edge-with an ac: curately machined wall of only slightly less diameter than the interior of the cylindrical portion 29 of'the separation plate. This construction enables a suction to be created within the cylindrical portion 29 whenever relative movements of the inertia member and tank are-imparted and this suction is used forregulating the height of the liquid within the tank 10 as hereinafter described. A'

bile as it rolls along the road is sufficient to set in motion the tank 10, which, it moves vertically relatively to the inertia member formed by the plunger 23 and the weight 24,

which because of its great mass is compara-J tively slow to vibrate and can be considered as remaining in a substantially stationary position. The downward movement of the tank 10 tends to lower the cylinder 13 relatively to the plunger 23 creating a suction which lifts the ball 19 from-its seat and draws in liquid from the supply tank 8 through the feed pipe 16. The upward movement of thetends to close the ball valve 19 and force the liquid then within the cylinder 13 into the fuel chamber in the lower portion of the tank 10 by elevating the ball 26 and passing through the slot 27 1n the plunger. The next downward movement of the tank relatively to the inertia member will again draw liquid fuel into the cylinder 13, and this alternate admission and ejection from the cylinder13 will be continued until the liquid Within the tank 10 has I.8-&(Jl 18(1' 21 predetermined level which is'controlledin' the following manner. As soon as the liquid within the tank 10 has reached the height of the small aperture 40 in the separation plate 29 the next downward movement of the tankrelatively to the inertia member will create a suction which will draw liquid fuel from the fuel chamber of the tank 10 through the aperture 10 intothe damping chamber 31. Up to this time the vibrations had forced air through'the aperture 40 alternately in oppositedirections and so the movement of the enlarged portion 39 the level of the aperture 40'the liquid is drawn into the portion 29 of the damping chamber on the downward movement of the tank 10, which liquid cannot be forced through theaperture 40 again on the next upward movement of the tank 10 becauseof the small diameter of the aperture. The next downward motionof the tank then draws more liquid into the dampingchamber which cannot all be expelled on the next upward movement of the tank. In this manner the liquid within the damping chamber gradually increases in quantity until it serves to prevent any relative movement between the tank and the inertia member, offering such a resistance to relative movement downward that the inertia member will be moved in'each direction simultaneously with the shell of the tank.

The feeding of liquid from the fuel chamber of the tank 10 to the carburetor 9 will continue unabated until the level of the liquid within the fuel chamber drops below the aperture 40, whereupon the liquid within the damping chamber will be expelled into the fuel chamber and the pumping mechanism will again be set in motion to enable further suction of liquid fuel from the supply tank 8. The invention is a modification of those shown in the a plications filed jointly with Chester H. .l raselton entitled Inertia pump and Vibration operated pumping mechanism, Serial Nos. 532,718 and 533,493 respectively, and filed Jan. 30, 1922 and Feb. 1, 1922, respectively.

Having described claimis: p

1. In a fuel. feeding mechanism, a supply my invention what I tank, an auxiliary tank connected therewith, an outlet pipe connected to the auxiliary tank, means for pumping liquid from the supply tank to the auxiliary tank comprising a cylinder secured to the floor of the auxiliary tank, a weighted plunger fitting into the cylinder and forming an inertia member, a spring for normally maintaining the plunger in raised position, a separation plate surrounding the phuiger and adapted to divide the tank into upper and lower compartments, said separation plate having an aperture therein connecting said compartments, and an enlarged portion on said plunger adapted to cooperate with said upper compartment to form a dampening chamber.

2. In a fuel feeding mechanism, a supply tank, an auxiliary tank connected therewith, an outlet pipe connected to the auxiliary tank, means for pumping liquid from the supply tank to the auxiliary tank comprising a cylinder secured to the floor of the auxiliary tank, a weighted plunger fitting into the cylinder and forming an inertia member, a spring for normally maintaining the plunger in raised position, a separation plate surrounding the plunger and adapted to divide the tank into upper and lower compartments, said separa tion plate having an aperture therein connecting said compartments, and guide means for the relative movements of the tank and the inertia member, cooperating with said upper compartment to form a dampening chamber.

3. In a fuel feeding mechanism, a supply tank, an auxiliary tank connected therewith, an outlet pipe connected to the auxiliary tank, means for pumping liquid from the supply tank to the auxiliary tank comprising a cylinder secured to the floor of the auxiliary tank, a weighted plunger fitting into the cylinder and forming an inertia member, a spring for normally maintaining the plunger in raised position, a separation plate surrounding the plunger and adapted to divide the tank into upper and lower compartments, said separation plate having a cylinder portion larger than said weighted plunger and adapted to receive an enlargement formed of a portion of the inertia member and also having an aperture therein connecting the lower compartment of the tank with such cylinder portion.

4-. In a fuel feeding mechanism, a tank having upper and lower compartments, a separation plate having a plurality of apertures between said compartments formed with an enlarged central cylindrical portion, vibration operated means within the tank for drawing liquid fuel into the lower compartment including an inertia member passing through the separation plate and having an enlarged portion fitting into the cylinder portion of such plate, whereby the separation plate acts as a guide for the inertia member.

partments and having a central aperture therein for the reception of said weight, said plate being formed with an enlarged cylin- I drical portion having an aperture therein connecting the upper and lower compartments of the tank, and means carried by the plunger for movement within the cylinder portion of the plate to regulate the quantity of liquid within the lower compartment.

6. In a fuel feeding apparatus, a tank, vibration operated pumping mechanism therein including an inertia member, a separation plate dividing the tank into a lower fuel compartment and an upper damping compartment, said plate having a plurality of apertures connecting the compartments and also having an enlarged cylinder portion adapted to snugly receive a portion of the inertia member to form an auxiliary piston whereby the height of the liquid in the fuel compartment is controlled.

7. In a fuel feeding mechanism, a tank having upper and lower compartments, a separation plate having a plurality of apertures between said compartments, vibration operated means within the tank for drawin liquid fuel into the lower compartment, said means including an inertia member passing through the separation plate, and means attached to the inertia member above the separation plate and cooperating therewith to form a dampening chamber.

In testimony whereof, I affix my signature.

FRED MAoLAREN. 

